Product Properties
Adsorption
Bio-surfactant adsorption at the interface is less than chemical surfactants
| Name | Maximum Adsorption (mg/g) |
|---|---|
| Biosurfactant | < 1.0 |
| Chem-Cationic Surfactant | 4-10 |
| Chem-anionic Surfactant | 1-100 |
| Chem-nonionic Surfactant | 10-100 |
| On the sandstone under room temperature |
Adsorption
Biosurfactants adsorb less at the interface than do chemical surfactants
| Name | Maximum Adsorption (mg/g) |
|---|---|
| Biosurfactants | < 1.0 |
| Synthetic cationic surfactants | 4-10 |
| Synthetic anionic surfactants | 1-100 |
| Synthetic non-ionic surfactants | 10-100 |
| Conditions: on sandstone under room temperature |
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Biodegradation
Compared with chemical surfactants, biosurfactant have better environmental compatibility, due to their lower toxicity, easier biodegradation, and lower (or non) bioaccumulation.
| Name | LD50 (mouse) | 100% Biodegradation under aerobic conditions |
|---|---|---|
| Biosurfactants | > 10000 | 5-6 Days |
| Synthetic cationic surfactants | < 1000 | > 100 Days |
| Synthetic anionic surfactants | 1000-5000 | > 20 Days |
| Synthetic non-ionic surfactants | 1000-10000 | > 20 days |
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Surface and Interfacial Tension
pH Stability
Relationship between surface tension and pH of biosurfactant solutions at their CMC
Temperature Stability
Changes in surface tension of solutions containing biosurfactants at CMC after heat treatment at different temperatures
Salinity Stability
Metal Ions Stability
Influence of metal ions on surface tension of biosurfactant solutions at their CMC.
Emulsification Stability
Effect of temperature, pH, salinity and metallic ions concentration on biosurfactant emulsification stability at a concentration of 2000 ppm.
Critical Micell Concentration
| Trade Name | Chemical Name | Ionic Nature | HLB | CMC mg/L |
|---|---|---|---|---|
| ABS | Rhamnolipid | Anionic | 23 | 20-40 |
| BSS | Lipopeptide | Anionic / Nonionic | 10-15 | 40-50 |
| CTAB | Cetyl Trimetyl Ammonium Chloride | Cationic | 21.4 | 5500 |
| Dehyquart A | Cetyl Trimetyl Ammonium Chloride | Cationic | 21.4 | 5500 |
| Emulgin | W600 Ethoxylated Nonyl Phenol | Nonionic | 11.0 | 45.06 |
| SDS | Sodium Dodecyl Sulfate | Anionic | 40.0 | 2120 |
| Triton X-100 | Octyl Phenol Etoxilates23 Peo | Nonionic | 16.9 | 1000 |
| Tween 80 | Lauryl Alcohol Ether | Nonionic | 16.7 | 400 |
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